Question

bird have hello boxes filled with​

Answer 1

Flightless birds do have hollow bones. Ostriches and emus have hollow femurs.

Answer 2

Flightless birds do have hollow bones. Ostriches and emus have hollow femurs.

Actually, a whooping crane is large but lightweight. Like all birds, whooping cranes have hollow bones that make their bodies lighter. With hollow bones a bird can fly very long distances without getting worn out from carrying its own weight.

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